Deep-well pump



Apr. 3, 1923.

H. SCHWAB DEEP WELL PUMP Filed Jan. 10, 1922 INVENTOR,

Jiwr) Jab/W WW ATTORNEY Patented Apr. 3, 1923.

HENRY SCHWAB, 0F BICKNELL, CALIFORNIA.

DEEP-WELL PUMP.

Application filed January 10, 1922, Serial No. 528,288.

To all whom it may concern:

Be it known that I, HENRY SCHWAB, a citizen of the United States, residing at Bicknell, 'in the county of Santa Barbara and State of California, have invented new and useful Improvements in Deep-Well Pumps,'of which the following is a specification. 1

This invention relates to deep well pumps, and particularly to the valve mechan sm thereof, and the invention has for its ob ect the provision of improved pump construction which will be generally superior in point of relative simplicity and inexpensiveness in manufacture, taken in conjunction with increased efliciency, positiveness in action, reliability, durability and serviceablllWith the above mentioned and other objects in view, the invention consists in the novel and useful provision, construction, combination, association and relative arrangement of parts, members and features, all as hereinafter described, shown in the drawing, and finally pointed out in claim.

In the drawing:

Figure 1 is a fragmentary central vertical sectional view of features of pump construction embodying the invention;

Figure 2 is an elevation of the valve housin used in practicing the invention;

%igure 3 is a plan view of the device shown in Figure 2; and

Figure 4 is a transverse sectional view of the improved pump, taken on the line 44 of Figure 1, and looking in the directionof the appended arrows.

' Corresponding parts in all the figures are designated by the same reference characters.

Referring with particularity t0 the drawing, A designates the pump barrel in its entirety, within which is located a working piston valve B. This valve ordinarily cooperates with a standing valve, not shown in the drawing, which is mounted in the pump barrel A and operates in conjunction with the valve to be described. The standing valve, not shown, may be organized substantially in duplication of the working valve B. The valve B in the embodiment shown may include a valve cage a which comprises a plurality of spaced vertical members 1 merging at one end into a junction zone 2, at which zone is provided a threaded fitting 3 for connection with pump rods or sucker rods, not shown. The opposite end of the spaced vertical members 1 terminates in an annular ring 4 internally tapered and threaded as at 5. A body I; threaded as at 6, cooperates with the threaded portion 5 of the valve cage a as shown. The body 6 may likewise be threaded as at 7 and have a screw threaded engagement with a plunger 8. The

- annular ring 4 is formed with an annular shoulder 9, and the annular opening 10 in the body I) is enlarged as at 11. A valve housing 0 provided with an annular flange 12 is received between the cage a and the body I). The flange 12 of said valve housing 1s held in tight engagement between the shoulder 9 of the ring 4, and the end 13 of the body 6. The annular portion 14 of the valve housing 0 fits within the enlarged portion 11 of the body 6, so that the inner wall surface thereof is in approximate alignment with the inner surface of the body 6. The valve housing is likewise provided with two collars 15 and 16 fitting on the flange 12 and adapted to be interposed in one instance between the shoulder 9 and the flange 12, and in the other instance between the end 13 and the flange 12. Obviously, a screwing of the body 12 within the ring 4 will securely maintain'the valve housing 0 in position.

A- piston valve C is adapted to play vertically within the valve housing a, and said piston valve includes a body portion 17 and a portion 18 which is channeled or grooved as shown at 19, with such channels respectively separated by alternating fins 20. The body 17 is provided at its top portion with -a reduced neck portion 21 to which is connected a head or crown 22, said head or crown being of greater diameter than the body 17 The head or crown ordinarily seats upon the top of the valve housin as shown at 23 and the valve housing at t is point is preferably grooved or relieved as shown at 24.

It is to be understood that the standing valve is mounted in a housing connected with the lower end of the pump barrel by a nipple extended downwardly from the pump barrel, such features not being shown, as not pertaining to the invention, which only applies to the valve mechanism and its assoclated features, whether the same be used in the standing valve or working valve, or both, nor is there shown a Garbutt rod or other means for withdrawing the standin valve with the working valve, such not being involved in the present invention.

In the operation of the pump, including the valve mechanism described, the plunger 8 with the body I), is reciprocated vertically in the pump barrelwith its extension, not shown, and in such action the valve head 22 is caused to leave'i-ts seat 23 as the plunger and connected parts descend, and to return to its seat as said connected parts ascend. \Vhen the valve head 22 leaves its seat in the relative movement between it and its housing 0, the said valve C rises a suflicient distance so that the channels 19 are exposed above the housing 0, which permits fluid to enter the space above the. housing a to where it is allowed to pass through the space between the members 1 of the cage (in. As soon as the plunger and connected parts are again elevated, the valve head 22 drops upon its seat and the fluid imprisoned above it is elevated in the pump barrel. Repetition of these alternate raisings and lowerings of 'the plunger and associated parts causes a progressive elevation of the fluid in the well, particularly when a standing valve and working valve are used together, in the well-known manner; I

Ordinarily in the use of ball and other valves employed in the service under consideration, the constant seating and re-seating of the valves, in conjunction with abrasion, produced by silt, sand and other debris, cuts away and de-forms the valves and seats thereof, so that efliciency of same is quickly reduced, accompanied by leakage of fluid, improper and ineffective seating of the valves and the like. To overcome the deficiencies mentioned above, it is to be observed that the body 17 of the working valve C has a close working fit with the valve housing 0. Furthermore, the valve head 22 is so arranged that it simply acts as a stop to limit the excursion or lay of the valve C within the housing 0. he relieved portion 24 prevents any burr from being formed that would tend to impair movement of the valve C. Obviously the continuous reciprocation of the valve C within its housing 0 tends to cause a wear between the various parts, particularly if the fluid pumped is impure. As a result the housing 0 is made detachable so that by separating the cage a from the body I) the valve housing 0 may be removed and a new one placed there-between. By so constructing the cage (1 and the body I) it is possible to renew the housing c without the necessity of providing a new valve 13 considered in its entirety. This immediately makes the valve B, as shown, inexpensive of construction and gives it an increased efliciency. The collars- 15 and 16 may be made of metal other than the metal ordinarily used in forming the valve B so as to provide for unequal expansion of the parts and thus insure a close fit'between the valve housing and the cage and body so that no fluid may leak between said parts.

It is obvious that many changes and variations may be made in departure from the specific construction shown in the drawing 'and hereinabove described, without departing from the true spirit of the invention.

Having thus disclosed In invention, I claim and desire to secure by letters Patent:

A valve structure for oil well pumps including a body member'having an externally tapered and-threaded portion at its upper end, a valve cage member having an interiorly tapered and threaded ring portion for engaging with the externally tapered and threaded portion of the body, and the said ring portion of the cage being provided with an interior stepped shoulder, a detachable valve housing having an annular exterior rib adapted to be engaged by the upper edge of the body and the stepped shoulder of the ring thereby to be firmly held in place, and the upper edge of said valve housing constituting a valve seat, the inner edge of which is cut away, and a piston valve including a body fluted at one end and having a disc-like head portion at the other, the underside of the said disc-like head portion adapted to reston the valve seat formed at the upper edge of the valve housing, and the portion of the body adjacent the head being reduced in diameter to provide a clearance chamber to supplement the cut away portion of the valve seat.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

HENRY. SCHWAB.

Witnesses:

VVALTER ELLIOT, L J. Gowsmr. 

